Final answer:
If you are always current on the Instrument Proficiency Check (IPC), you do not need to do an IPC. The IPC is good for 6 months. The 6-6-6 rule mandates the requirements for IFR currency.
Step-by-step explanation:
If you are always current on the Instrument Proficiency Check (IPC), you do not need to do an IPC. The IPC is a 6-monthly check that pilots must undertake to ensure their instrument flying skills are up to date. If you let your currency lapse, meaning you are no longer current, you will need to undergo an IPC to regain your currency.
The IPC is good for 6 months from the date it is completed. So if you completed an IPC on April 1st, it would be valid until September 30th. After that, you would need to do another IPC to maintain your instrument currency.
If you have just obtained your Instrument Flight Rules (IFR) rating today, you need to start doing your 6 supervised, instrument approaches, 6 holding procedures, and 6 intercepting and tracking headings within the next 6 calendar months. These requirements are part of the 6-6-6 rule for IFR currency.